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Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | May 03, 2021
Income Tax Expense (Benefit), Total | $ (12,552) | $ (0) | $ (12,552) | $ (0) |
Effective Income Tax Rate Reconciliation, Percent, Total |  |  | 217.00% |  |
Discrete Tax Benefit |  |  | $ 8,500 |  |
Stock Compensation Windfall Tax Benefits |  |  | $ 3,200 |  |
Effective Income Tax Rate Reconciliation, Before Discrete Items, Percent |  |  | 20.00% |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  | 21.00% |  |
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount |  |  | $ (8,500) |  |
GCI Acquisition [Member] |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities |  |  |  |  | $ 23,526

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